Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended		0 Months Ended
	Apr. 25, 2013	Apr. 25, 2013 Subsequent Event [Member]	Oct. 23, 2013 Subsequent Event [Member] Definitive Agreement to Merge [Member]	Oct. 23, 2013 Subsequent Event [Member] Definitive Agreement to Merge [Member] Heritage [Member]
Subsequent Event [Line Items]
Number of shares of Heritage common stock to be received by each of the Company's shareholders			0.89000
Cash payment per share to be received by the Company's shareholders			$ 2.75
Closing share price (in usd per share)				$ 15.89
Consideration value per share (in usd per share)			$ 16.89
Total consideration value			$ 265.1
Percentage of voting interests acquired			46.00%	54.00%
Date when dividend was declared	Oct. 23, 2013
Amount of dividend per share (in dollars per share)		$ 0.145
Date of record	Nov. 04, 2013
Date payable	Nov. 19, 2013